iMac (27-inch, Mid 2010) Symptom Charts — Display 56
2010-09-09
3. When display icker, verify
whether one of the following
symptoms occurred:
• Flickering image
• Horizontal bands of static
intermittently appear
• Dock and / or menu bar shift
positions
• Display intermittently ashes
on / o
Yes Remove glass and LCD panel.
Check , reseat, and secure the
DisplayPort LCD cable to both
ends. Check and reseat the
VSync cable to both ends.
Go to step 4.
No LCD panel OK.
Go to step 4.
4. Power ON computer and verify
if issue still occurs.
Yes If connections are secure and
display is still ickering, go to
step 5.
No Issue resolved.
5. Carefully disconnect and
veriy if any of the four cables
on back of LCD panel show
signs of damage, corrosion, or
pinched wires.
Yes Replace and damaged
cable(s) and retest.
X03
No Go to step 6.
6. Verify whether ickering occurs
when brightness level is set
below max.
Yes Image present but backlight
is ickering. Replace Vertical
sync cable (between LCD
panel and LED Backlight
board) and retest. Replace
backlight board if problem
persist.
X03
No Replace internal DisplayPort
cable (between Logic Board
and LCD panel), retest and go
to step 7.
X03
7. Verify if ickering issue is still
present.
Yes Replace LCD panel.
Run Apple Service Display
Utility to verify the resolution
of issue.
Enter the resulting verication
code into the “Notes” eld
of GSX and return system to
customer if repair is complete
L06
No Issue resolved.